Plants 30-65 cm. high.. Corm 1.5-2.2 cm. in diameter, tunics firm to softly membranous, fragmenting irregularly, sometimes becoming subfibrous, dark red-brown.. Leaves 4-8, the lower 3-5 basal, narrowly lanceolate, reaching at least to the base of the spike, sometimes slightly exceeding it, 5-12 mm. at the widest, relatively soft-textured and without thickened margins or midrib.. Stem erect or inclined, unbranched, 3-4 mm. in diameter at the base of the spike.. Spike often inclined, 3-5-flowered; bracts green, the outer 5-8(-10) cm. long, the inner shorter than and concealed by the outer.. Flowers white, with a prominent dark purple streak in the midline of the lower 3 or all of the tepals, sweetly scented, more strongly in the evenings; perianth-tube cylindric and straight, slightly wider near the throat, (9-)12-15 cm. long; tepals ± equal, lanceolate, 3.5-4.5 cm. long, 1.7-2.2 cm. wide.. Filaments exserted 1-1.5 cm.; anthers ± 1.5 cm. long, with a rigid filiform apiculus 2-4 mm. long.. Style arching over the stamens, dividing beyond the anthers, the branches ± 5 mm. long, much expanded in the upper half.. Capsules oblong-ellipsoid, 2-2.5 cm. long.
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